But I think there is a valid concern about the trend to legislate against tinkering--restricting sales of radios that can hear on cell phone frequencies, DVDCSS, DRM, suppression of chemistry sets, evacuating a school due to misunderstanding of an electronics experiment.
Exactly. In Apple's vision of the future, using your own computer in ways they don't approve of is illegal: http://www.eff.org/deeplinks/2009/02/apple-says-jailbreaking... . That's right out of Stallman's "Right to Read" (http://www.gnu.org/philosophy/right-to-read.html), which 10 years ago I thought was ridiculously paranoid but now seems to be the environment many companies are striving to create.